Combined damper-regulator, relief-valve, gage, and alarm.



L. A. CHERRY.

COMBINED DAMPER REGULATOR, RELIEF VALVE, GAGE, AND ALARM. APPLICATIONFILED AUG.27, 1914.

1,148,755. Patented Aug. 3,1915.

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COLUMBIA PLANOURAPH CD.,WASH|NUTON, n. C.

L. A. CHERRY. EEEEEEEEEEEEEEEEEEEEEEEEEEEEEE VALVE, GAGE, AND ALARM.

1,148,755. Patented Aug. 3, 1915.

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LESTER A. .ClI-IERRY, OF KEN-MORE, NEW YORK.

COMBINED DAMPER-REGULATOR, RELIEF-VALVE, GHG E, ALARM.

Specification of LettersPatent.

Patentedhngfg, {g g Application filed August 27, 1914. seriaiarasssgsss.

To all whom it may concern:

Be it known that I, .Lnsrnn A. CH RRY, a citizen of the United States,residing at Kenmore, in the county of Erieand State of New York, haveinvented a new and useful Combined Damper-Regulator, Belief-Valve, Gage,and Alarm, of which the following is V a specification.

My invention relates to improvements in damper-regulators for use 1nvapor heatingsystems, the principal objects of the. invention beingeration of opening and closingthe dampers of the heating apparatus inaccordance with the pressure within the system, and which is of suchcomparatively simple construction and arrangement as to be capableofbeing cheaply and readily manufactured and applied and not at alllikely to get impaired by use or out of working order.

Further "objects of the invention are to so construct and arrange theregulator as to cause it to serve as a gage for the pressure, an alarmwhen the pressure passes a predetermined point, and as an efficientreliefvalve that will positively blow-off at a predetermined pressure ofvapor.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be particularly pointed out in 'theappended'claims.

Referring to the drawings-Figure 1 is a plan view of a combineddamper-regulator, gage, alarm, and relief-valve, constructed inaccordance with my invention. Fig. 2 is a Vertical sectional view of thesame through the center. Fig. 3 is a front elevation of a fragment ofthe regulator showing the pressure-gage in front elevation. Fig. i is asimilar view showing the pressure-gage in side elevation. Fig. 5 is anelevation of the upper portion of a round-type "of boiler showing myinvention attached to the dome thereof.

Similar numerals of. reference indicate similar parts all the figures ofthe drawings.

an annular chamber 1, the wall of which at to produce a damper-regulatorthat will be positive and accurate in its op- I closed by the same.

In carrying out my invention, I employ midway its ends, as attherebymombining 'Wltl1;tll6 wall 2, to produce an annuilar sub---stant1al1y U-shaped channel 13. The internal flange 3 is open at itsupper end, which la'tterfis considerably below the upper end of thechamber 1, and over-said opening of the flange is an inverted bellshaped6, the annular wall of which iswithin the before-mentioned U-s hapejdannular channel p 5 and upon whosebottom-it-rests. This diaphragm,therefore, .is of substantially the same depth as the internal annularflangeS, and serves to normally close the space in- The upper end 0f thechamber 1 -is closed by a cover, bolt Sfbeing employed for conwith acentrally located internally threaded 1 depending boss 11,, -:the outersurf'ace of which may be formed polygonal or angular to --adapt it toreceive a Wrench. This boss, it will be understood, is by a pipe12,-connected to the stealn-dome 13., of .a boiler 14. '(See Fig. -5.) Aguide-bar '15.,spans thedepending :boss 11, at its upper end, and isheld in position by bolts- 16. This guidebar is centrally perforatedend-receives the :lower plain endof -a -rod 1 7 which extends upwardlythrough the opening 10 of the belLshaped diaphragm 6 and cover 7escape-opening :9 of theisame, the latter opening being of considerablygreater diameter than the rod 17. At a point above the guide-bar -1-5,the -rod 1'7 is threaded, and to rlend'to its stability, it may=a1lsopass through a :brace 18-, riveted at its ends to the arnder-:side 7 of the :bel l-shag aed diaphragm, from which it depends andhaving a perforation that receives said rod. Above andbelow the brace,nuts :1'9, m a'y lbs-mounted ofnthe rod. so as :to clamp the brace, andsimilar nuts 20, also be threaded on the rod unbove and below the top ofthediaphragm and, in addition :to serving 'tohold the rod in properrelation to the diaphragm yalso serve to clamp upon washers '21, used toclose the opening 10 in said diaphragm.

Located at the upper "end-of the rod 17,

' the bottom thereof, is a pipe-connection 35,5

' located the thechamber 1, being fulcrumed thereon by means of atransverse pin or pintle 27. Pinned to about the center of the lever 24,is a slotted block 28, and within the same is somewhat longer than thelever 24, and adjustably co'nnected to the latter by "a setscrew 30.-The damper operating lever 29 carries an adjustable Weight 31, which'maybe secured in its adjusted positions by a setscrew 32, and at its frontand rear ends said lever 29 is connected to damper-operat1ng chains 33and 34,-respectively. The chain '33 leads to the usual draft-damperofthe ash-pit of the furnace, while the chain 34 leadsto the usualchecledamper in the smoke-pipe. See Fig. 5.) It will be understood, thatin very large boilers, where the lever 29 would, therefore, have to beunreasonably long, the chain 34, instead of be ing connected to the rearend-of the lever, as shown in Fig. 2, may be connected to the front endof said lever'and' then carried upward and rearward oversu-itablepulleys to a point where it could be dropped to and connectedwith the check-damper.

Communicating with and extending from the channel or well 5, of thechamber, and at the bottom of the chamber, at this point,

' wardly therefrom and perforated, while seated and secured in itsvertical portion, by means of a packing and nut 39, is a gageglass 40,the'upper end of which is open.

Immediately above the extension 38 of the pipe-connection 35, the cover7 of the chamher is likewise'extended, as at 41, and, like the extension38, is perforated, ordinary guard-rods 42,depending through the same.Upon the gage-glass and capable of vertical adjustment with relationthereto, is a substantially U-shaped but horizontally dis- "posedgage-plate 43, the terminals of this plate being perforated to looselyreceive the rods 42. Anadjusting-screw 44, is threaded in asuitableopening formed in the lower extension 38, and is disposedupwardly and supportsthe gage-plate 43, whereby, the latter maybesupported in any'of its adjusted positions. Immediately above the upperopen end of the gage-glass is an electrical connection 45, from whichleads a circuitwire 46, the latter being in electrical circuit with asuitable battery and buzzer or other style of alarm; The battery andalarm are damper-operating lever 29,

of the conventional style and are herein shown. The remaining batteryterminal 47 may be connected at any convenient'point of the apparatus,of the plug '37.

This completes the construction of the apparatus, and the operation maybe briefly described as follows: The U-shaped channel or well 5 ispartially filled with a body of mercury, and when there is no pressurein the boiler, the parts occupy the position in which they are shown inFig. 2, the height of the body of mercury being indicated byslottedfulcrum-block 2 6', and the fulcrum pin 27 such'vertical movementof the diaphragm being against the weight 31. By means of theseconnections and the guide the depending wall of the diaphragm is alwaysmaintained within the channel or well 5. The weight 31 is, ofcourse,-adjusted in accordance with the degree 'of pressure at which thesystem is to be operated. This as for instance, at the bottom upwardmovement of the diaphragm, causes 4 a downward movement of the front endof the lever 29, and the chain '33, at that end of the lever lowers andeither partially or wholly closes thedamper at the ash-pit of thefurnace, thus cutting off or decreasing the supply of air to the fuelaccordingly. having a drain 36', normally closed by a screw-plug 37. Thepipe 35 is of L-shape,

and has an extension 38, extending for By this sameoperation, the rearend of the lever 29 is elevated, and, through the chain 34, lifts thecheck-damper in the smoke-pipe,

thus still further reducing the rateof combustion by a reduction ofdraft.- In this manner the operation of these two drafts serves tocontrol thefire. In the event the pressure, for some reason, should notbe controlled by the manipulation of these Further increase in pressurewill now cause the steam within the diaphragm to force the mercury belowthe lower edge of the, diaphragm and thus escape thereunder 'up throughthe body of mercury within the" channel?) and outside of thediaphragmand from thence out through the escape-opening 9 after-which, thepressure having lowered, the mercury Wlll return to the position shownby dotted lines in Fig. 2. This affords a positive relief from anyexcess pressure and removes all danger.

Of course the pressure of steam within the diaphragm will cause themercury in the gage-glass to rise correspondingly, so that the actualpressure of the boiler may be read thereon at any time. The adjustablescale behind the gage-glass is preferably graduated so as to show orindicate this pressure in ounces per square inch. When no pressure ison, the scale is adjusted up or down until the Zero of the scale is inalinement with the body of mercury in the gage-glass, the adjustingscrew 44 being used for this purpose, the same being locked by means ofa lock-nut @8. Any change in pressure may then be readily read from thescale. Suitably insulated, and extending downwardly from the electricalconnection i5, within the upper open end of the gageglass, is a platinumwire or electrode 6&9, vertically adjustable by means of a milled nut50, to and from the column of mercury within the glass. This electrodeis, of course, adjusted at the proper height above the column ofmercury, so that when the latter rises, said column and the electrodecontact and complete the electric circuit and the buzzer, beforementioned, or other style of alarm-device is sounded.

From the foregoing description, it will be apparent that I have produceda most efficient and dependable draft-regulator, the construction beingsuch as to render it capable of also serving as a safety-device and asan alarm.

It will be understood that I have herein merely described andillustrated the preferred form of construction, and that the same may bealtered as to details without departing from the spirit or sacrificingthe advantages of my invention.

Having described my invention, what I claim, is:

1. The combination with a steam-boiler, of a damper-regulator, the samecomprising an annular chamber, having an escape-opening at its upper endand connected to the boiler, and having a vertically disposed internalannular flange of less depth than and combining with the wall of thechamber to form a shallow annular channel adapted to receive a body ofmercury, an inverted bell-shaped diaphragm mounted over the internalflange, approximating the same in depth and having its side-walldepending into said channel, a rod extending upwardly Copies of thisfrom the diaphragm and through and above the opening in the chamber, alever fulcrumed upon the chamber and connected to the rod, andconnecting chains between the lever and the dampers of the boiler.

2. The combination with a steam boiler, of a damper regulator, the samecomprising an annular chamber, reduced at its lower end, at its bottomconnected to the boiler,

and having an internal hollow flange out-.

wardly flared at its bottom and combining with the wall of the chamberto form an annular reduced guide-channel adapted to receive a body ofmercury, an inverted bellshaped diaphragm mounted over the internalflange and approximating the same in depth and having its side-walldepending into said reduced guide-channel, a rod extending upwardly fromthe diaphragm and above the chamber, a lever fulcrumed on the chamber,an extension adjustably connected therewith, a weight adjustable on theextension, and chains leading from the extension to the dampers of theboiler.

3. The combination with a steam-boiler, of a damper regulator connectedtherewith, the same consisting of an annular closed chamber having acentral escape-opening in its top and an inlet-opening in the bottomconnected to the boiler, an internal annular flange rising from thebottom of less depth than the chamber and combining therewith to form anannular channel, a body of mercury therein, an inverted bellshapeddiaphragm approximating in depth that of the annular flange and arrangedover the same and having its side-wall depending into the channel, aperforated stay or brace depending from the underside of said diaphragm,a perforated guide over the inlet-opening in the bottom of the chamber,a rod extending through, above and below the top of the diaphragm andthe stay or brace and through the guide, clamping-nuts on the rod aboveand below the diaphragm and the stay or brace, a weighted lever abovethe chamber, a pivotal connection between the same and the upper end ofthe rod, and chains leading from the weighted lever to the dampers ofthe boiler.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LESTER A. CHERRY.

Witnesses ROBERT N. CUNDALL, JAMEs J. PFEFFER.

patent may be obtained for five cents each, by addressing theCommissioner of Patents,

Washington, D. G.

